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SAMPLE GGA MESSAGE STRUCTURE
The following example of the GGA message shows the format typical of NMEA messages.
$GPGGA,171741,3019.3909,N,09741.8629,W,2,08,00.9,+00180,M,x.x,M,003,0800*78
Field 1
Field 2
Type of Message
Message Source (GPS)
Message Flag
Field Description
$
Message Flag
GP
Message Source (GPS)
GGA Type of Message
1
Universal time coordinate (UTC)
of Position
2
Latitude, North or South
3
Longitude, East or West
4
GPS Quality Indicator (mode)
5
Number of Satellites in Use
Field 3
Field 4
Field 5
9
Field 6
Field 7
Field 8
Field 9
Field 10
Field 11
Field Description
6
Horizontal Dilution of Precision
7
Antenna Altitude Ref: Mean Sea
Level (geoid)
8
Units of Antenna Altitude
(meters in example)
9
Geoidal Separation
10
Units of Geoidal Separation
(meters in example)
11
Age of Differential Data, seconds
12
Reference Station ID
13
Checksum
Field 12
Field 13
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